<template>
  <transition name="dialog-fade">
    <!-- @click.self避免冒泡，只有点击自己时才能触发   -->
    <div class="lk-dialog__wrapper"  v-show="visible" @click.self="handleClose">
    <div class="lk-dialog" :style="{width, marginTop: top}">
      <div class="lk-dialog__header">
        <slot name="title"> 
          <span class="lk-dialog__title">{{title}}</span>
        </slot>
        <button class="lk-dialog__headerbtn" @click="handleClose">
          <i class="lk-icon-close"></i>
        </button>
      </div>
      <div class="lk-dialog__body">
        <!-- 默认插槽 -->
        <slot></slot>
      </div>
      <div class="lk-dialog__footer">
        <!-- 如果footer不传递内容，则不显示footer -->
        <slot name="footer" v-if="$slots.footer"></slot>
      </div>
    </div>
  </div>
  </transition>
</template>

<script>
export default {
  name: "LkDialog",
  props: {
    title: {
      type: String,
      default: '提示'
    },
    width: {
      type: String,
      default: '50%'
    },
    top: {
      type: String,
      default: '15vh'
    },
    visible: {
      type: Boolean,
      default: false
    }
  },
  data () {
    return {
      show: false
    }
  },
  methods: {
    handleClose () {
      this.$emit('update:visible', false)
    }
  }
}
</script>

<style lang="scss">
  .lk-dialog__wrapper{
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  overflow: auto;
  margin: 0;
  z-index: 2001;
  background-color: rgba(0,0,0,0.5);
  .lk-dialog{
    position: relative;
    margin: 15vh auto 50px;
    background: #fff;
    border-radius: 2px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
    box-sizing: border-box;
    width: 30%;
    &__header{
      padding: 20px 20px 10px;
      .lk-dialog__title{
        line-height: 24px;
        font-size: 18px;
        color: #303133;
      }
      .lk-dialog__headerbtn{
        position: absolute;
        top: 20px;
        right: 20px;
        padding: 0;
        background: transparent;
        border: none;
        outline: none;
        cursor: pointer;
        font-size: 16px;
        .one-icon-close{
          color:909399
        }
      }
    }
    &__body{
      padding: 30px 20px;
      color: #606266;
      font-size: 14px;
      word-break: break-all;
    }
    &__footer{
      padding: 10px 20px 20px;
      text-align: right;
      box-sizing: border-box;
      .lk-button:first-child{
        margin-right: 20px;
      }
    }
  }
}
  .dialog-fade-enter-active{
    animation: fade .3s;
  }
  .dialog-fade-leave-active{
    animation: fade .3s reverse;
  }
  @keyframes fade{
    0% {
      opacity: 0;
      transform: translateY(-20px);
    }
    100%{
      opacity: 1;
      transform: translateY(0);
    }
  }
</style>